Electrically-operated door.



l. L. CAIN. ELECTRICALLY OPERATED DOOR.

APPLICATION FILED MAY 5. 1915.

1,192,856, I Patented Aug. 1,1916.

2 SHEETS-SHEET 1- (Elwin/"$01 I. L. CAIN. ELECTBICALLY OPERATED DOOR.

APPLICATIQN FILED MAY 5, I915. Q

Patented Aug. 1, 1916.

2 SHEETS-SHEET -2.

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neyg 11m 1.. cam, or saw ANGELO, 'rExAs.

ELECTRICALIiY-OPERATED noon,

- To all whom it may concern Be it known that I, IRA L. CA1i-I,a citizen of the United States, residing at San Angelo,

in'.the county of Tom like buildings,

I out the services of door.

I iWith' theabove'and other objects in view Green and State of Texas, have invented provements in Electrically-Operated Doors, of-which the following is a specification.

My inventionrelates to improvements in entrance doors for buildings and more especially with reference to improvements in electrically operated means for opening and closing the double doors of oiiice and other theobject of the invention being to provide improved means of this character by which approaching the door stepson a manually operable circuit closer and is closed as theperson after passing the door steps on'another manually operable circuit closer, so;-

that the mechanism periorms allthe functionsof opening andclosing the door, withan attendant and without effort on the part of the person using the the invention consists in the construction, combinat on and arrangement of dBV-ICBS hereinafterdescribed and claimed.

.In' the=accompany1ng drawings z-Figtire- 1 is a diagrammatic plan of a pair of sliding doors provided with electrically actuated I means for opening and closing them, constructed and arranged in accor 1 my invention. Fig. 2 is a dance with diagrammatic elevation'o'f one of the doors" and its opening mechanism, and showing the door in. closed position; Fig. 3 is a similar View, from the reverse side, showing the door in open position and showing its releasing mechanism.

Fig. 4 is-a detail elevation of the door carried tappet, 'the electromagnet, the switch andthe V provided withelectrically actuated means 1 Fig. 1 and arranged so that a person on make andibrealr devices of the motor and 'electromagnet circuits which are. alternately and reversely' operated by the switch.

" For theapurposes pair ,of slidingdoorsl are indicated in Fig. 1 of the drawings. Each of these doors is for opening the door, releasing'it after being opened," and for then automatically closing it and since such operating means is identical foreach of the-doors I only describe the operatingmeans for one of the doors herein it being'unde'rstoodthat the operating means for the doors are reversed as indicated in new and useful- Imhere shown as provided with suspended a door is opened as a person plate 9 is of this specification -a.

doors will enter by the right hand door and when leaving the building will use the other door.

Each door 1 is slidab ly mounted and is Patented Aug, 1, 1916.' Application filed May 5,1915. SerialN o.26,122. I I i hangers 2 at its upper side, said hangers having rollers 3 which'engage an elevated track rail 4. A weight 5 is here shown for closing each door, said weight being connected to p one side of each door and in'the way of a person approaching said door to use it when entering the building I provide a foot plate 9, which is" arranged in the floor,

1s vertically movable, is depressed whenqli stepped upon, 10 for raising said plate after the person has and is provided with springs stepped 011' the same.

To open is provided with a suitable drum 12 for the door I provide an electric J motor indicated at 11 and the shaft-of which winding and unwinding a cord 13 which is attached to the door as at 14. and engages a;

I direction pulley '15. lhe motor is included in an electriccircuit 16 which also includes conductors 16, a source of electric energy here indicated as a battery 17-,a normally.

open circuit closer. 18, which is operated by the plate 9..when the latter is depressed and contacts 18, I

On the opposite side of the door from the ed to be stepped upon by a person who has used and passed the door in entering, thisplate 19 havlng springs 20 to normally hold a similar plate 19 which is adaptj a the same in raised position. An 'el'ectro magnet 21 is included in a normally open circuit 22 witha circuit closer 23'operate'd by depressing the plate 19, the battery or' source of electricity 17 and contacts 24;.

Said circuit 22 also includes the conductors.-

16 asindicated in Fig. 1. A spring switch arm 25 is arranged between the'contacts 18,

24 to alternately cause them to close the motor circuit 16 and the electromagnet circuit 22. This spring switch ,armha-s a camshaped free end'26 provided witha shoulder 27 and is also p'rovided,1on its lower side,

with an armature 28, attracted by'the elece tromagnet. When the door is closed by the tappet 8 is action of its weight 5 the cam away from the cam end ofthe switch, the

motor circuit is opened at -18 and is closed .When a person approaches the door Y from the outside, to enter through it, he

' weight 5 attached to the door.

switch cam from the cam 8,

steps upon the plate 9, thereby closing the 4 motor circuit at 18 and hence puts the motor In operation and-causes the drum 12' to partly Wind the cord '13and thereby move the door to open position and raise the As the door reaches a nearly fullyopened positionits cam 8 depresses the cam end 26 of the switch 25 causing said switch to open the motor circuit at 18 and to close the electromagnet circuit at 24. As the p again at 18 and the electromagnet circuit is opened at 24, thus restoring all the parts to initial position.

Having thus described my invention I claim 1. An electric circuit including a source of electricity, a motor, contacts, and a nor-' mally open .clrcuit closer; a second circuit including said source of electricity contacts,

an eleclromagnet, and a second open circuit closer; eration by the motor and-having a tappet, and a switch arm rson after passing the door reaches the pla e 19 he steps upon normally a door arranged for opoperable by the tappet to open the first named contacts when the door reaches open position and to engage the tappet and thereby lock the door in such posi tion, and to also close said second named contacts, and having an armature for attraction by the electromagnet, to release the switch from the 'tappet and permit the door to close.

2. An electric circuit including a source of electricity, a motor, contacts, and a normally open circuit closer; a second circuit including said source of electricity, contacts, an electromagnet, tor, and having a tappet, means to close the door when the moto1'. is' ,;jo -1t of operation,

and a switch arm operable'bytlie tappet, to

open the first named contacts 'when the door reaches open position, and to engage the tappet'and thereby lock the door in such position,.and to also close said second con a door opened by the mo tacts, and having an armature for attraction by the electro-magnet to release the switch from the tappet, and permit the door to close.

In testimony whereof I affix my signature in presence oftwo witnesses.

IRA L. CAIN. Witnesses: I

M. E. LEDBERRY, R. A. WEAVER. 

